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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium dianae
var. pseudodianae (J. Roy) Willi Krieger 1935

Species [ var. dianae ]: Cell body slightly curved, tapered toward both ends, truncated with slanted edges, small pores present at outside of both termini, inner side at center slightly convex, 150-380 μm long, 15-40 μm wide, L/W = 10-12; cell wall smooth; chloroplasts with 5-8 pyrenoids in each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).
Cell body 160-323 μm long, 20-28 μm wide, L/W=8.3-12; chloroplasts with about 6 laminae; semicells with 4-8 pyrenoids (Photomicrographs of the Freshwater Algae, vol. 6, 1987).
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var. pseudodianae : More slender; 135-300 x 12-22 μm; L/W=16-23; pyrenoids/chl.
Closterium dianae
v. pseudodianae ?
or C. ralfsii
450,460 x 31 μm
L/W=14.5,14.8
Onnenai
Kushiro marsh
Hokkaido, 2005
Closterium
v. pseudodianae ?
or C. ralfsii
350 x 23 μm
L/W=15.2
Kashibaru m.5
Karatsu
Saga, 2006
Closterium dianae
v. pseudodianae ?
or C. ralfsii
275 x 19 μm
L/W=14.5
Shimizu-daira
Nasu
Tochigi, 2005
Closterium
v. pseudodianae
245 x 17 μm
L/W=14.5
water reservoir
near Yamaguchi Univ.
Yamaguchi, 2004
Closterium dianae
v. pseudodianae
225 x 16 μm
L/W=14.1
Koigakubo marsh
Tessei-cho
Okayama, 2004
Closterium dianae
v. pseudodianae ?
150 x 11 μm
L/W=13.6
Numa-no-hara m.
Madarao highland
Niigata, 2005
Closterium dianae
v. pseudodianae ?
203 x 15 μm
L/W=13.5
Midori-no-ike
Togakushi highland
Nagano, 2005
Closterium dianae
v. pseudodianae
240 x 15 μm
L/W=16.0
Hasu-ike
Shiga highland
Nagano, 2005
Closterium
v. pseudodianae
292 x 15 μm
160 x 13 μm
L/W=12.3, 19.5
Ichinose-enchi
Norikura highland
Nagano, 2005
Closterium dianae
v. dianae
or v. pseudodianae ?
190 x 10.5 μm
L/W=18.1
Kumakubo
Nasu-shiobara
Tochigi, 2005
Closterium
v. pseudodianae ?
144-155 x 11.5 μm
L/W=12,13.5
Iroha-numa
Zao mountain
Yamagata, 2006
Closterium dianae
v. pseudodianae ?
150 x 10 μm
L/W=15
Kashibaru marsh 6
Karatsu
Saga, 2006
Similar species -->> C. venus ( < 85 μm ); C. calosporum; C. parvulum; C. leibleinii; C. moniliferum;

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Closterium dianae
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